Function ExampleBucket_List_withDelimiter

blob/example_test.go:259–319

()

}

func ExampleBucket_List_withDelimiter() {
	// Connect to a bucket when your program starts up.
	// This example uses the file-based implementation.
	dir, cleanup := newTempDir()
	defer cleanup()

	// Create the file-based bucket.
	bucket, err := fileblob.OpenBucket(dir, nil)
	if err != nil {
		log.Fatal(err)
	}
	defer bucket.Close()

	// Create some blob objects in a hierarchy.
	ctx := context.Background()
	for _, key := range []string{
		"dir1/subdir/a.txt",
		"dir1/subdir/b.txt",
		"dir2/c.txt",
		"d.txt",
	} {
		if err := bucket.WriteAll(ctx, key, []byte("Go Cloud Development Kit"), nil); err != nil {
			log.Fatal(err)
		}
	}

	// list lists files in b starting with prefix. It uses the delimiter "/",
	// and recurses into "directories", adding 2 spaces to indent each time.
	// It will list the blobs created above because fileblob is strongly
	// consistent, but is not guaranteed to work on all services.
	var list func(context.Context, *blob.Bucket, string, string)
	list = func(ctx context.Context, b *blob.Bucket, prefix, indent string) {
		iter := b.List(&blob.ListOptions{
			Delimiter: "/",
			Prefix:    prefix,
		})
		for {
			obj, err := iter.Next(ctx)
			if err == io.EOF {
				break
			}
			if err != nil {
				log.Fatal(err)
			}
			fmt.Printf("%s%s\n", indent, obj.Key)
			if obj.IsDir {
				list(ctx, b, obj.Key, indent+"  ")
			}
		}
	}
	list(ctx, bucket, "", "")

	// Output:
	// d.txt
	// dir1/
	//   dir1/subdir/
	//     dir1/subdir/a.txt
	//     dir1/subdir/b.txt